Acid Gas Management
Everything affects SO3… and… SO3 affects everything. Boiler cleanliness, Ash Chemistry, back-pass cleanliness, sootblowing all effect the total SO3 at the economizer outlet. SO3 into the SCR effects SCR operation and Minimum Operating Temperature.
NH3 slip at the SCR outlet combines with SO3 to form Ammonium Bisulfate.
Enhanced Gas Co-firing
Enhanced gas cofiring removes many of the economic and environmental problems that face coalfired generating assets. With continued pressure from the EPA, many small to medium sized coal-fired generating stations are facing economic uncertainty. Do they invest in the high-capital-cost systems needed to comply with NOx and SO2 limits, do they operate on a limited basis when demand allows or do they close altogether?
DeMercTM is an Inorganic Sulfide based additive that is introduced into the Scrubber Recycle stream and sprayed with the scrubber liquor. DeMerc is not only a re-emission suppression agent but it also directly captures elemental Hg and sequesters it with the Gypsum. DeMerc is the first and only additive technology that not only prevents Re-Emission of oxidized mercury (Hg) in the scrubber, but also captures elemental mercury (Hg) and a variety of other metals.